Wilko Path and Patio Cleaner 2 litre is a non-acid based exterior hard surface cleaner which can be used on a wide range of hard surfaces such as brick, tarmac, asphalt, block paving, concrete and stone. Unlike acid based treatments, this formula uses chemicals to clean, instead of corroding away the surface, therefore you'll get different results compared to Wilko's previous hydrochloric based formulation. The concentrate is specially formulated to remove a wide range of stains from exterior surfaces such as paths, driveways, patios and walls. Warning: Irritant. Always read instructions and keep out of reach of children. Contains <5% cationic surfactant, <5% Sodium Tripolyphosphate, Sodium Metasilicate, NTA.